import Vue from 'vue'
import VueRouter from 'vue-router'
import login from '../components/login.vue';
import home from '../components/home.vue';
import welcome from '../components/welcome.vue';
import users from '../components/user/users.vue';
import rights from '../components/power/rights.vue';
import roles from '../components/power/roles.vue';

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: 'login' },
  { path: '/login', component: login },
  {
    path: '/home',
    component: home,
    redirect: '/welcome',
    children: [
      { path: '/welcome', component: welcome },
      { path: '/users', component: users },
      { path: '/rights', component: rights },
      { path: '/roles', component: roles }
    ]
  }

]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to将要访问的路径
  // from从哪个路径跳转而来
  // next函数表示放行 next()放行  next('/login')强制跳转、
  if (to.path === '/login') {
    return next()
  }
  const tokenStr = window.sessionStorage.getItem('token');
  if (!tokenStr) {
    return next('/login')
  }
  next()
})

export default router
